Você pode fazer isso usando o recurso de alias mount.ecryptfs_private . A partir do manpage:
mount.ecryptfs_private is a mount helper utility for non-root users to
cryptographically mount a private directory, ~/Private by default.
This program optionally takes one argument, ALIAS. If ALIAS is
omitted, the program will default to using "Private" using:
- $HOME/.Private as the SOURCE
- $HOME/Private as the DESTINATION
- $HOME/.ecryptfs/Private.sig for the key signatures.
If ALIAS is specified, then the program will look for an fstab(5) style
configuration in:
- $HOME/.ecryptfs/ALIAS.conf and for key signature(s) in:
- $HOME/.ecryptfs/ALIAS.sig